Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
ASSETS
Property, Plant and Equipment	$ 6,438,525	$ 5,646,918
Less - Accumulated Depreciation, Depletion and Amortization	1,817,655	1,646,394
Property, Plant and Equipment, Net, Total	4,620,870	4,000,524
Current Assets
Cash and Temporary Cash Investments	140,815	80,428
Hedging Collateral Deposits	3,392	19,701
Receivables - Net of Allowance for Uncollectible Accounts of $38,538 and $31,039, Respectively	113,949	131,885
Unbilled Utility Revenue	12,212	17,284
Gas Stored Underground	24,787	54,325
Materials and Supplies - at average cost	28,137	27,932
Unrecovered Purchased Gas Costs	2,100	0
Other Current Assets	48,246	64,923
Deferred Income Taxes	14,727	15,423
Total Current Assets	388,365	411,901
Other Assets
Recoverable Future Taxes	147,652	144,377
Unamortized Debt Expense	13,991	10,571
Other Regulatory Assets	481,900	484,397
Deferred Charges	5,781	5,552
Other Investments	84,495	79,365
Goodwill	5,476	5,476
Fair Value of Derivative Financial Instruments	85,905	76,085
Other	2,418	2,836
Total Other Assets	827,618	808,659
Total Assets	5,836,853	5,221,084
Capitalization:
Common Stock, $1 Par Value Authorized - 200,000,000 Shares; Issued and Outstanding - 83,270,363 Shares and 82,812,677 Shares, Respectively	83,270	82,813
Paid in Capital	666,012	650,749
Earnings Reinvested in the Business	1,287,898	1,206,022
Total Common Shareholders' Equity Before Items of Other Comprehensive Loss	2,037,180	1,939,584
Accumulated Other Comprehensive Loss	(47,940)	(47,699)
Total Comprehensive Shareholders' Equity	1,989,240	1,891,885
Long-Term Debt, Net of Current Portion	1,149,000	899,000
Total Capitalization	3,138,240	2,790,885
Current and Accrued Liabilities
Notes Payable to Banks and Commercial Paper	70,200	40,000
Current Portion of Long-Term Debt	250,000	150,000
Accounts Payable	88,119	126,709
Amounts Payable to Customers	17,761	15,519
Dividends Payable	30,393	29,399
Interest Payable on Long-Term Debt	16,320	25,512
Customer Advances	315	19,643
Customer Security Deposits	16,847	17,321
Other Accruals and Current Liabilities	160,899	108,636
Fair Value of Derivative Financial Instruments	16,193	9,728
Total Current and Accrued Liabilities	667,047	542,467
Deferred Credits
Deferred Income Taxes	1,062,824	955,384
Taxes Refundable to Customers	65,554	65,543
Unamortized Investment Tax Credit	2,150	2,586
Cost of Removal Regulatory Liability	148,668	135,940
Other Regulatory Liabilities	39,657	17,177
Pension and Other Post-Retirement Liabilities	481,331	481,520
Asset Retirement Obligations	78,232	75,731
Other Deferred Credits	153,150	153,851
Total Deferred Credits	2,031,566	1,887,732
Commitments and Contingencies	0	0
Total Capitalization and Liabilities	$ 5,836,853	$ 5,221,084